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Reconciliation of Basic and Diluted Shares
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Reconciliation of Basic and Diluted Shares
Reconciliation of Basic and Diluted Shares
 
 
Three Months Ended
 
 
March 31
(In thousands, except per share amounts)
 
2013
 
2012
Income (loss) from continuing operations attributable to Harsco Corporation common stockholders
 
$
7,642

 
$
(28,963
)
 
 
 
 
 
Weighted-average shares outstanding - basic
 
80,706

 
80,579

Dilutive effect of stock-based compensation
 
224

 
—

Weighted-average shares outstanding - diluted
 
80,930

 
80,579

 
 
 
 
 
Earnings (loss) from continuing operations per common share, attributable to Harsco Corporation common stockholders:
 
 
 
 
Basic
 
$
0.09

 
$
(0.36
)
 
 
 
 
 
Diluted
 
$
0.09

 
$
(0.36
)

The following average outstanding stock-based compensation units were not included in the three months ended computation of diluted earnings per share because the effect was antidilutive:
 
 
Three Months Ended
 
 
March 31
(In thousands)
 
2013
 
2012
Restricted stock units
 
—

 
64

Stock options
 
304

 
460

Stock appreciation rights
 
—

 
56

Other
 
—

 
159